/*
  This file is part of the Grantlee template system.

  Copyright (c) 2010 Stephen Kelly <steveire@gmail.com>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either version
  2.1 of the Licence, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef GRANTLEE_ABSTRACTLOCALIZER_H
#define GRANTLEE_ABSTRACTLOCALIZER_H

#include "grantlee_core_export.h"

#include <QtCore/QLocale>
#include <QtCore/QSharedPointer>
#include <QtCore/QVariantList>

class QDateTime;

namespace Grantlee
{

/**
  @brief Interface for implementing an internationalization system.

  This class defines an interface for accessing an internationalization, such as
  QLocale/QTranslator or gettext/KLocale.
*/
class GRANTLEE_CORE_EXPORT AbstractLocalizer
{
public:
  /**
    A QSharedPointer to an AbstractLocalizer
  */
  typedef QSharedPointer<AbstractLocalizer> Ptr;

  /**
   Constructor
  */
  AbstractLocalizer();

  /**
   Destructor
  */
  virtual ~AbstractLocalizer();

  /**
    Processes the data in @p variant into a localized string.

    The base implementation can localize numbers, dates and times, and strings.
  */
  virtual QString localize( const QVariant &variant ) const;

  /**
    Returns the current locale as a string.
  */
  virtual QString currentLocale() const = 0;

  /**
    Makes this localizer use the locale specified by @p localeName for output.
  */
  virtual void pushLocale( const QString &localeName ) = 0;

  /**
    Makes this localizer use the previous locale for output.
   */
  virtual void popLocale() = 0;

  /**
    Loads the @p catalog from @p path.
  */
  virtual void loadCatalog( const QString &path, const QString &catalog ) = 0;

  /**
    Unloads the @p catalog
  */
  virtual void unloadCatalog( const QString &catalog ) = 0;

  /**
    Localizes @p number
  */
  virtual QString localizeNumber( int number ) const = 0;

  /**
    Localizes @p number
  */
  virtual QString localizeNumber( qreal number ) const = 0;

  /**
    Localizes @p value as a monetary value in the currency specified by @p currencyCode.
  */
  virtual QString localizeMonetaryValue( qreal value, const QString &currencyCode = QString() ) const = 0;

  /**
    Localizes @p date with the specified @p formatType
  */
  virtual QString localizeDate( const QDate &date, QLocale::FormatType formatType = QLocale::ShortFormat ) const = 0;

  /**
    Localizes @p time with the specified @p formatType
  */
  virtual QString localizeTime( const QTime &time, QLocale::FormatType formatType = QLocale::ShortFormat ) const = 0;

  /**
    Localizes @p dateTime with the specified @p formatType
  */
  virtual QString localizeDateTime( const QDateTime &dateTime, QLocale::FormatType formatType = QLocale::ShortFormat ) const = 0;

  /**
    Localizes @p string with the specified @p arguments for substitution
  */
  virtual QString localizeString( const QString &string, const QVariantList &arguments = QVariantList() ) const = 0;

  /**
    Localizes @p string, disambiguated by @p context with the specified @p arguments for substitution
  */
  virtual QString localizeContextString( const QString &string, const QString &context, const QVariantList &arguments = QVariantList() ) const = 0;

  /**
    Localizes @p string or its @p pluralForm with the specified @p arguments for substitution
  */
  virtual QString localizePluralString( const QString &string, const QString& pluralForm, const QVariantList &arguments = QVariantList() ) const = 0;

  /**
    Localizes @p string or its @p pluralForm, disambiguated by @p context with the specified @p arguments for substitution
  */
  virtual QString localizePluralContextString( const QString &string, const QString& pluralForm, const QString &context, const QVariantList &arguments = QVariantList() ) const = 0;
private:
  Q_DISABLE_COPY( AbstractLocalizer )
};

}

#endif
